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try with restarting computer & press F8 at the same time. u will see a menu where choose "safe mode" & start the computer. in safe mode see the display properties, set the refresh rate & resolution according to monitors specifications, apply & restart again. if that does not work, replace the main board of lcd monitor.

try with restarting computer & press F8 at the same time. u will see
a menu where choose "safe mode" & start the computer. in safe mode
see the display properties, set the refresh rate & resolution
according to monitors specifications, apply & restart again. if that
does not work, replace the main board of lcd monitor.

This is the same problem I am having with my Speptre X20WG Naga Monitor.
The power LEDS are usually red in standby and blue in opp; but now they just go purple and nothing happens..no sound no picture. I called tech support and no dice they just wanted my money, but I think all we might have to do is change a fuse on the main pcb! As you can see the white arrow isnt really pointing to anything specific! I think the fuse is the lt blue component, but am not sure. This is all I can offer! If you gat any good tips or if anyone else finds a fix please email me pbj0327@yahoo.com.
Thanks! and good luck m007!

i fixed this problem by unplugging the monitor, unplugging the video cables. Then hold down the power button while plugging it back in. Release power button and then press power button for on. It worked then. I got the icon for no signal, i plugged back in my monitors. Sceptre X9W